Add pre-commit check for migration version sync between defaults and examples/vars.yml

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.pre-commit-config.yaml

@@ -30,3 +30,11 @@ repos:
         files: '^roles/custom/'
         args: ['roles/custom']
         pass_filenames: false
+  - repo: local
+    hooks:
+      - id: check-examples-vars-migration-version
+        name: Check examples/vars.yml migration version matches expected
+        entry: bin/check-examples-vars-migration-version.sh
+        language: script
+        files: '(examples/vars\.yml|roles/custom/matrix_playbook_migration/defaults/main\.yml)'
+        pass_filenames: false

bin/check-examples-vars-migration-version.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+
+# SPDX-FileCopyrightText: 2026 Slavi Pantaleev
+#
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+# Ensures that the migration validated version in examples/vars.yml
+# matches the expected version in the matrix_playbook_migration role defaults.
+
+set -euo pipefail
+
+defaults_file="roles/custom/matrix_playbook_migration/defaults/main.yml"
+examples_file="examples/vars.yml"
+
+expected_version=$(grep -oP '^matrix_playbook_migration_expected_version:\s*"?\K[^"]+' "$defaults_file")
+examples_version=$(grep -oP '^matrix_playbook_migration_validated_version:\s*"?\K[^"]+' "$examples_file")
+
+if [ -z "$expected_version" ]; then
+	echo "ERROR: Could not extract matrix_playbook_migration_expected_version from $defaults_file"
+	exit 1
+fi
+
+if [ -z "$examples_version" ]; then
+	echo "ERROR: Could not extract matrix_playbook_migration_validated_version from $examples_file"
+	exit 1
+fi
+
+if [ "$expected_version" != "$examples_version" ]; then
+	echo "ERROR: Migration version mismatch!"
+	echo "  $defaults_file has expected version: $expected_version"
+	echo "  $examples_file has validated version: $examples_version"
+	echo ""
+	echo "Please update $examples_file to match."
+	exit 1
+fi